What we know about the Dallas gunman: Army veteran reportedly said he ‘wanted to kill white people’.

An undated photo posted on Facebook on April 30, 2016, shows Micah Johnson, suspected of the sniper slayings of five law enforcement officers in Dallas on July 7, 2016.

Micah Xavier Johnson, 25, is shown in this April photo from his Facebook page. He is suspected of the sniper slayings of five law enforcement officers in Dallas on Thursday and was killed by police after a standoff. (Facebook via AP)

Los Angeles Times
by Laura J. Nelson, Nigel Duara

The shooter, barricaded in a downtown Dallas parking garage, bantered with negotiators during an hours-long standoff.

He did not seem nervous and said he was not afraid to die.

He told the armed officers facing him that he had been preparing for the assault, vowing that he “wanted to kill white people, especially white…